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Wang X, Menezes CJ, Jia Y, Xiao Y, Venigalla SSK, Cai F, Hsieh MH, Gu W, Du L, Sudderth J, Kim D, Shelton SD, Llamas CB, Lin YH, Zhu M, Merchant S, Bezwada D, Kelekar S, Zacharias LG, Mathews TP, Hoxhaj G, Wynn RM, Tambar UK, DeBerardinis RJ, Zhu H, Mishra P. Metabolic inflexibility promotes mitochondrial health during liver regeneration. Science 2024; 384:eadj4301. [PMID: 38870309 PMCID: PMC11232486 DOI: 10.1126/science.adj4301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 04/17/2024] [Indexed: 06/15/2024]
Abstract
Mitochondria are critical for proper organ function and mechanisms to promote mitochondrial health during regeneration would benefit tissue homeostasis. We report that during liver regeneration, proliferation is suppressed in electron transport chain (ETC)-dysfunctional hepatocytes due to an inability to generate acetyl-CoA from peripheral fatty acids through mitochondrial β-oxidation. Alternative modes for acetyl-CoA production from pyruvate or acetate are suppressed in the setting of ETC dysfunction. This metabolic inflexibility forces a dependence on ETC-functional mitochondria and restoring acetyl-CoA production from pyruvate is sufficient to allow ETC-dysfunctional hepatocytes to proliferate. We propose that metabolic inflexibility within hepatocytes can be advantageous by limiting the expansion of ETC-dysfunctional cells.
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Affiliation(s)
- Xun Wang
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Cameron J Menezes
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Yuemeng Jia
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Yi Xiao
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | | | - Feng Cai
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Meng-Hsiung Hsieh
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Wen Gu
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Liming Du
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jessica Sudderth
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Dohun Kim
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Spencer D Shelton
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Claire B Llamas
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Yu-Hsuan Lin
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Min Zhu
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Salma Merchant
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Divya Bezwada
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Sherwin Kelekar
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Lauren G Zacharias
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Thomas P Mathews
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Gerta Hoxhaj
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - R Max Wynn
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Uttam K Tambar
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Ralph J DeBerardinis
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Hao Zhu
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Departments of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Prashant Mishra
- Children's Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
- Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
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Alanazi M, Yong J, Wu M, Zhang Z, Tian D, Zhang R. Recent Advances in Detection of Hydroxyl Radical by Responsive Fluorescence Nanoprobes. Chem Asian J 2024; 19:e202400105. [PMID: 38447112 DOI: 10.1002/asia.202400105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/06/2024] [Accepted: 03/06/2024] [Indexed: 03/08/2024]
Abstract
Hydroxyl radical (•OH), a highly reactive oxygen species (ROS), is assumed as one of the most aggressive free radicals. This radical has a detrimental impact on cells as it can react with different biological substrates leading to pathophysiological disorders, including inflammation, mitochondrion dysfunction, and cancer. Quantification of this free radical in-situ plays critical roles in early diagnosis and treatment monitoring of various disorders, like macrophage polarization and tumor cell development. Luminescence analysis using responsive probes has been an emerging and reliable technique for in-situ detection of various cellular ROS, and some recently developed •OH responsive nanoprobes have confirmed the association with cancer development. This paper aims to summarize the recent advances in the characterization of •OH in living organisms using responsive nanoprobes, covering the production, the sources of •OH, and biological function, especially in the development of related diseases followed by the discussion of luminescence nanoprobes for •OH detection.
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Affiliation(s)
- Mazen Alanazi
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St. Lucia, Queensland, 4072, Australia
| | - Jiaxi Yong
- Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, St. Lucia, Queensland, 4072, Australia
| | - Miaomiao Wu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St. Lucia, Queensland, 4072, Australia
| | - Zexi Zhang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St. Lucia, Queensland, 4072, Australia
| | - Dihua Tian
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St. Lucia, Queensland, 4072, Australia
| | - Run Zhang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St. Lucia, Queensland, 4072, Australia
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3
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Zhang N, Wang X, Feng M, Li M, Wang J, Yang H, He S, Xia Z, Shang L, Jiang X, Sun M, Wu Y, Ren C, Zhang X, Li J, Gao F. Early-life exercise induces immunometabolic epigenetic modification enhancing anti-inflammatory immunity in middle-aged male mice. Nat Commun 2024; 15:3103. [PMID: 38600123 PMCID: PMC11006929 DOI: 10.1038/s41467-024-47458-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 04/03/2024] [Indexed: 04/12/2024] Open
Abstract
Exercise is usually regarded to have short-term beneficial effects on immune health. Here we show that early-life regular exercise exerts long-term beneficial effects on inflammatory immunity. Swimming training for 3 months in male mice starting from 1-month-old curbs cytokine response and mitigates sepsis when exposed to lipopolysaccharide challenge, even after an 11-month interval of detraining. Metabolomics analysis of serum and liver identifies pipecolic acid, a non-encoded amino acid, as a pivotal metabolite responding to early-life regular exercise. Importantly, pipecolic acid reduces inflammatory cytokines in bone marrow-derived macrophages and alleviates sepsis via inhibiting mTOR complex 1 signaling. Moreover, early-life exercise increases histone 3 lysine 4 trimethylation at the promoter of Crym in the liver, an enzyme responsible for catalyzing pipecolic acid production. Liver-specific knockdown of Crym in adult mice abolishes this early exercise-induced protective effects. Our findings demonstrate that early-life regular exercise enhances anti-inflammatory immunity during middle-aged phase in male mice via epigenetic immunometabolic modulation, in which hepatic pipecolic acid production has a pivotal function.
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Affiliation(s)
- Nini Zhang
- Key Laboratory of Aerospace Medicine, Ministry of Education; School of Aerospace Medicine, Fourth Military Medical University, Xi'an, China
- Department of Pediatrics, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Xinpei Wang
- Key Laboratory of Aerospace Medicine, Ministry of Education; School of Aerospace Medicine, Fourth Military Medical University, Xi'an, China
| | - Mengya Feng
- Key Laboratory of Aerospace Medicine, Ministry of Education; School of Aerospace Medicine, Fourth Military Medical University, Xi'an, China
- Center for Mitochondrial Biology and Medicine, Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Min Li
- Key Laboratory of Aerospace Medicine, Ministry of Education; School of Aerospace Medicine, Fourth Military Medical University, Xi'an, China
| | - Jing Wang
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Hongyan Yang
- Key Laboratory of Aerospace Medicine, Ministry of Education; School of Aerospace Medicine, Fourth Military Medical University, Xi'an, China
| | - Siyu He
- Key Laboratory of Aerospace Medicine, Ministry of Education; School of Aerospace Medicine, Fourth Military Medical University, Xi'an, China
| | - Ziqi Xia
- Key Laboratory of Aerospace Medicine, Ministry of Education; School of Aerospace Medicine, Fourth Military Medical University, Xi'an, China
| | - Lei Shang
- Key Laboratory of Hazard Assessment and Control in Special Operational Environment, Ministry of Education; Department of Health Statistics, School of Public Health, Fourth Military Medical University, Xi'an, China
| | - Xun Jiang
- Department of Pediatrics, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Mao Sun
- Department of Biochemistry and Molecular Biology, Center for DNA Typing, Fourth Military Medical University, Xi'an, China
| | - Yuanming Wu
- Department of Biochemistry and Molecular Biology, Center for DNA Typing, Fourth Military Medical University, Xi'an, China
| | - Chaoxue Ren
- School of Sport and Health Science, Xi'an Physical Education University, Xi'an, China
| | - Xing Zhang
- Key Laboratory of Aerospace Medicine, Ministry of Education; School of Aerospace Medicine, Fourth Military Medical University, Xi'an, China
| | - Jia Li
- Key Laboratory of Aerospace Medicine, Ministry of Education; School of Aerospace Medicine, Fourth Military Medical University, Xi'an, China.
- Key Laboratory of Hazard Assessment and Control in Special Operational Environment, Ministry of Education; Department of Health Statistics, School of Public Health, Fourth Military Medical University, Xi'an, China.
| | - Feng Gao
- Key Laboratory of Aerospace Medicine, Ministry of Education; School of Aerospace Medicine, Fourth Military Medical University, Xi'an, China.
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Grayson C, Faerman B, Koufos O, Mailloux RJ. Fatty acid oxidation drives mitochondrial hydrogen peroxide production by α-ketoglutarate dehydrogenase. J Biol Chem 2024; 300:107159. [PMID: 38479602 PMCID: PMC10997840 DOI: 10.1016/j.jbc.2024.107159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 02/29/2024] [Accepted: 03/06/2024] [Indexed: 04/07/2024] Open
Abstract
In the present study, we examined the mitochondrial hydrogen peroxide (mH2O2) generating capacity of α-ketoglutarate dehydrogenase (KGDH) and compared it to components of the electron transport chain using liver mitochondria isolated from male and female C57BL6N mice. We show for the first time there are some sex dimorphisms in the production of mH2O2 by electron transport chain complexes I and III when mitochondria are fueled with different substrates. However, in our investigations into these sex effects, we made the unexpected and compelling discovery that 1) KGDH serves as a major mH2O2 supplier in male and female liver mitochondria and 2) KGDH can form mH2O2 when liver mitochondria are energized with fatty acids but only when malate is used to prime the Krebs cycle. Surprisingly, 2-keto-3-methylvaleric acid (KMV), a site-specific inhibitor for KGDH, nearly abolished mH2O2 generation in both male and female liver mitochondria oxidizing palmitoyl-carnitine. KMV inhibited mH2O2 production in liver mitochondria from male and female mice oxidizing myristoyl-, octanoyl-, or butyryl-carnitine as well. S1QEL 1.1 (S1) and S3QEL 2 (S3), compounds that inhibit reactive oxygen species generation by complexes I and III, respectively, without interfering with OxPhos and respiration, had a negligible effect on the rate of mH2O2 production when pyruvate or acyl-carnitines were used as fuels. However, inclusion of KMV in reaction mixtures containing S1 and/or S3 almost abolished mH2O2 generation. Together, our findings suggest KGDH is the main mH2O2 generator in liver mitochondria, even when fatty acids are used as fuel.
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Affiliation(s)
- Cathryn Grayson
- The School of Human Nutrition, Faculty of Agricultural and Environmental Sciences, McGill University, Quebec, Canada
| | - Ben Faerman
- The School of Human Nutrition, Faculty of Agricultural and Environmental Sciences, McGill University, Quebec, Canada
| | - Olivia Koufos
- The School of Human Nutrition, Faculty of Agricultural and Environmental Sciences, McGill University, Quebec, Canada
| | - Ryan J Mailloux
- The School of Human Nutrition, Faculty of Agricultural and Environmental Sciences, McGill University, Quebec, Canada.
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Chalifoux O, Faerman B, Mailloux RJ. Mitochondrial hydrogen peroxide production by pyruvate dehydrogenase and α-ketoglutarate dehydrogenase in oxidative eustress and oxidative distress. J Biol Chem 2023; 299:105399. [PMID: 37898400 PMCID: PMC10692731 DOI: 10.1016/j.jbc.2023.105399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/06/2023] [Accepted: 10/16/2023] [Indexed: 10/30/2023] Open
Abstract
Pyruvate dehydrogenase (PDH) and α-ketoglutarate dehydrogenase (KGDH) are vital entry points for monosaccharides and amino acids into the Krebs cycle and thus integral for mitochondrial bioenergetics. Both complexes produce mitochondrial hydrogen peroxide (mH2O2) and are deactivated by electrophiles. Here, we provide an update on the role of PDH and KGDH in mitochondrial redox balance and their function in facilitating metabolic reprogramming for the propagation of oxidative eustress signals in hepatocytes and how defects in these pathways can cause liver diseases. PDH and KGDH are known to account for ∼45% of the total mH2O2 formed by mitochondria and display rates of production several-fold higher than the canonical source complex I. This mH2O2 can also be formed by reverse electron transfer (RET) in vivo, which has been linked to metabolic dysfunctions that occur in pathogenesis. However, the controlled emission of mH2O2 from PDH and KGDH has been proposed to be fundamental for oxidative eustress signal propagation in several cellular contexts. Modification of PDH and KGDH with protein S-glutathionylation (PSSG) and S-nitrosylation (PSNO) adducts serves as a feedback inhibitor for mH2O2 production in response to glutathione (GSH) pool oxidation. PSSG and PSNO adduct formation also reprogram the Krebs cycle to generate metabolites vital for interorganelle and intercellular signaling. Defects in the redox modification of PDH and KGDH cause the over generation of mH2O2, resulting in oxidative distress and metabolic dysfunction-associated fatty liver disease (MAFLD). In aggregate, PDH and KGDH are essential platforms for emitting and receiving oxidative eustress signals.
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Affiliation(s)
- Olivia Chalifoux
- Faculty of Agricultural and Environmental Sciences, The School of Human Nutrition, McGill University, Ste.-Anne-de-Bellevue, Quebec, Canada
| | - Ben Faerman
- Faculty of Agricultural and Environmental Sciences, The School of Human Nutrition, McGill University, Ste.-Anne-de-Bellevue, Quebec, Canada
| | - Ryan J Mailloux
- Faculty of Agricultural and Environmental Sciences, The School of Human Nutrition, McGill University, Ste.-Anne-de-Bellevue, Quebec, Canada.
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Pérez-Montes C, Jiménez-Cubides JP, Velasco A, Arévalo R, Santos-Ledo A, García-Macia M. REDOX Balance in Oligodendrocytes Is Important for Zebrafish Visual System Regeneration. Antioxidants (Basel) 2023; 12:2026. [PMID: 38136146 PMCID: PMC10740785 DOI: 10.3390/antiox12122026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/09/2023] [Accepted: 11/20/2023] [Indexed: 12/24/2023] Open
Abstract
Zebrafish (Danio rerio) present continuous growth and regenerate many parts of their body after an injury. Fish oligodendrocytes, microglia and astrocytes support the formation of new connections producing effective regeneration of the central nervous system after a lesion. To understand the role of oligodendrocytes and the signals that mediate regeneration, we use the well-established optic nerve (ON) crush model. We also used sox10 fluorescent transgenic lines to label fully differentiated oligodendrocytes. To quench the effect of reactive oxygen species (ROS), we used the endogenous antioxidant melatonin. Using these tools, we measured ROS production by flow cytometry and explored the regeneration of the optic tectum (OT), the response of oligodendrocytes and their mitochondria by confocal microscopy and Western blot. ROS are produced by oligodendrocytes 3 h after injury and JNK activity is triggered. Concomitantly, there is a decrease in the number of fully differentiated oligodendrocytes in the OT and in their mitochondrial population. By 24 h, oligodendrocytes partially recover. Exposure to melatonin blocks the changes observed in these oligodendrocytes at 3 h and increases their number and their mitochondrial populations after 24 h. Melatonin also blocks JNK upregulation and induces aberrant neuronal differentiation in the OT. In conclusion, a proper balance of ROS is necessary during visual system regeneration and exposure to melatonin has a detrimental impact.
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Affiliation(s)
- Cristina Pérez-Montes
- Instituto de Neurociencias de Castilla y León (INCyL), 37007 Salamanca, Spain; (C.P.-M.); (J.P.J.-C.); (A.V.); (R.A.)
- Department of Human Anatomy and Histology, Universidad de Salamanca, 37007 Salamanca, Spain
- Instituto de Investigación Biomédica de Salamanca (IBSAL), 37007 Salamanca, Spain
| | - Jhoana Paola Jiménez-Cubides
- Instituto de Neurociencias de Castilla y León (INCyL), 37007 Salamanca, Spain; (C.P.-M.); (J.P.J.-C.); (A.V.); (R.A.)
| | - Almudena Velasco
- Instituto de Neurociencias de Castilla y León (INCyL), 37007 Salamanca, Spain; (C.P.-M.); (J.P.J.-C.); (A.V.); (R.A.)
- Instituto de Investigación Biomédica de Salamanca (IBSAL), 37007 Salamanca, Spain
- Department of Cell Biology and Pathology, Universidad de Salamanca, 37007 Salamanca, Spain
| | - Rosario Arévalo
- Instituto de Neurociencias de Castilla y León (INCyL), 37007 Salamanca, Spain; (C.P.-M.); (J.P.J.-C.); (A.V.); (R.A.)
- Instituto de Investigación Biomédica de Salamanca (IBSAL), 37007 Salamanca, Spain
- Department of Cell Biology and Pathology, Universidad de Salamanca, 37007 Salamanca, Spain
| | - Adrián Santos-Ledo
- Instituto de Neurociencias de Castilla y León (INCyL), 37007 Salamanca, Spain; (C.P.-M.); (J.P.J.-C.); (A.V.); (R.A.)
- Department of Human Anatomy and Histology, Universidad de Salamanca, 37007 Salamanca, Spain
- Instituto de Investigación Biomédica de Salamanca (IBSAL), 37007 Salamanca, Spain
| | - Marina García-Macia
- Instituto de Investigación Biomédica de Salamanca (IBSAL), 37007 Salamanca, Spain
- Institute of Functional Biology and Genomics (IBFG), Universidad de Salamanca/CSIC, 37007 Salamanca, Spain
- Department of Biochemistry and Molecular Biology, Universidad de Salamanca, 37007 Salamanca, Spain
- Centre for Biomedical Investigations Network on Frailty and Ageing (CIBERFES), 28029 Madrid, Spain
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Grayson C, Mailloux RJ. Coenzyme Q 10 and nicotinamide nucleotide transhydrogenase: Sentinels for mitochondrial hydrogen peroxide signaling. Free Radic Biol Med 2023; 208:260-271. [PMID: 37573896 DOI: 10.1016/j.freeradbiomed.2023.08.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 07/21/2023] [Accepted: 08/08/2023] [Indexed: 08/15/2023]
Abstract
Mitochondria use hydrogen peroxide (H2O2) as a mitokine for cell communication. H2O2 output for signaling depends on its rate of production and degradation, both of which are strongly affected by the redox state of the coenzyme Q10 (CoQ) pool and NADPH availability. Here, we propose the CoQ pool and nicotinamide nucleotide transhydrogenase (NNT) have evolved to be central modalities for mitochondrial H2O2 signaling. Both factors play opposing yet equally important roles in dictating H2O2 availability because they are connected to one another by two central parameters in bioenergetics: electron supply and Δp. The CoQ pool is the central point of convergence for electrons from various dehydrogenases and the electron transport chain (ETC). The increase in Δp creates a significant amount of protonic backpressure on mitochondria to promote H2O2 genesis through CoQ pool reduction. These same factors also drive the activity of NNT, which uses electrons and the Δp to eliminate H2O2. In this way, electron supply and the magnitude of the Δp manifests as a redox connection between the two sentinels, CoQ and NNT, which serve as opposing yet equally important forces required for budgeting H2O2. Taken together, CoQ and NNT are sentinels linked through mitochondrial bioenergetics to manage H2O2 availability for interorganelle and intercellular redox signaling.
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Affiliation(s)
- Cathryn Grayson
- The School of Human Nutrition, Faculty of Agricultural and Environmental Sciences, McGill University, Ste.-Anne-de-Bellevue, Quebec, Canada
| | - Ryan J Mailloux
- The School of Human Nutrition, Faculty of Agricultural and Environmental Sciences, McGill University, Ste.-Anne-de-Bellevue, Quebec, Canada.
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Wang X, Shen T, Lian J, Deng K, Qu C, Li E, Li G, Ren Y, Wang Z, Jiang Z, Sun X, Li X. Resveratrol reduces ROS-induced ferroptosis by activating SIRT3 and compensating the GSH/GPX4 pathway. Mol Med 2023; 29:137. [PMID: 37858064 PMCID: PMC10588250 DOI: 10.1186/s10020-023-00730-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 09/17/2023] [Indexed: 10/21/2023] Open
Abstract
BACKGROUND Intestinal ischemia-reperfusion injury occurs in acute intestinal obstruction, intussusception, acute mesenteric artery embolism, and other diseases and can lead to local intestinal necrosis, distant organ involvement, or systemic reactions, with high morbidity and mortality. Ferroptosis plays a crucial role in intestinal ischemia-reperfusion injury, and inhibition of ferroptosis may provide new approaches for treating the disease. SIRT3 protects cells from oxidative stress and may be involved in the process of ferroptosis. We hypothesized that resveratrol, an agonist of SIRT3, could ameliorate intestinal ischemia-reperfusion injury by compensating the GSH/GPX4 pathway. METHODS Intestinal ischemia-reperfusion (I/R) and Caco-2 hypoxia-reoxygenation models were established. Transmission electron microscopy was used to assess mitochondrial function; the Chiu's score was used to evaluate the degree of intestinal mucosal injury based on HE staining; and Western blot was used to detect the SIRT3/FoxO3a pathway, tight junction proteins and ferroptosis-related protein expression. Sirt3-/- C57, shSIRT3-Caco-2 cells and siFoxO3a-Caco-2 cells were established. C11-BODIPY was used to detect lipid peroxide in cells; FD4 and IFABP were used to detect intestinal permeability; MitoSOX was used to detect ROS levels; and MitoTracker and immunofluorescence colocalization were used to detect SIRT3 levels. RESULTS In the intestinal I/R model, I/R injury occurs mainly during the reperfusion period and leads to ferroptosis through the GSH/GPX4 pathway. Resveratrol could reduce ferroptosis and ameliorate I/R injury by activating SIRT3. In Sirt3-/- mice, more intestinal mucosal cells underwent ferroptosis, I/R injury was more severe, and resveratrol lost the ability to ameliorate I/R injury. In addition, hypoxia-reoxygenation increased RSL3-induced ferroptosis sensitivity in Caco-2 cells in vitro. In the presence of shSIRT3 or RSL3 alone, resveratrol could ameliorate Caco-2 ferroptosis, but not RSL3-induced shSIRT3-Caco-2 ferroptosis. Furthermore, resveratrol might activate the SIRT3/FoxO3a pathway, increase the expression of SOD2 and catalase, and inhibit ROS generation, thus reducing lipid peroxidation and ferroptosis. CONCLUSION To date, this is the first study to show that resveratrol ameliorates intestinal ischemia-reperfusion injury by activating SIRT3 and reducing ferroptosis. Resveratrol can reduce intestinal ischemia-reperfusion injury by activating the SIRT3/FoxO3a pathway, increasing the expression of SOD2 and catalase, reducing ROS and LPO production, compensating for the GSH/GPX4 pathway and inhibiting ferroptosis. Resveratrol increases the expression of SOD2 and catalase, reduces the production of ROS and LPO, compensates for the GSH/GPX4 pathway and inhibits ferroptosis by activating the SIRT3/FoxO3a pathway.
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Affiliation(s)
- Xingjie Wang
- Department of General Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China
| | - Tianli Shen
- Department of General Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China
| | - Jie Lian
- Department of Pathology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China
| | - Kai Deng
- Department of General Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China
| | - Chao Qu
- Department of General Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China
| | - Enmeng Li
- Department of General Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China
| | - Gan Li
- Department of General Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China
| | - Yiwei Ren
- Department of General Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China
| | - Zijun Wang
- Department of General Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China
| | - Zhengdong Jiang
- Department of General Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China
| | - Xuejun Sun
- Department of General Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China.
| | - Xuqi Li
- Department of General Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China.
- Department of Talent Highland, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China.
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